package ParamAuto;

import java.util.Map;
import java.util.Properties;

/**
 * @author wuhan
 * @date 2019/10/8 19:04
 */
public class Demo1 {
    public static void show(int... arr){
        System.out.println(arr.length);

    }
    public static void main(String[] args) {
//        show(1,2,3);
        Properties properties = System.getProperties();
        for (Map.Entry<Object, Object> objectObjectEntry : properties.entrySet()) {
            System.out.println(objectObjectEntry);
        }

    }
}
